<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="js/vue.js"></script>
</head>

<body>
    <div id="app">
        {{ msg.split("").reverse().join("") }}
        <br>
        <!-- 计算属性 -->
        {{reverseMsg}}
        <br>
        <input v-model="msg">
    </div>
    <script>
        var vm = new Vue({
            el: '#app',
            data: {
                msg: "hello Vue"
            },
            // 改变依赖值，计算属性就会变化
            computed: {
                reverseMsg: function () {
                   return this.msg.split("").reverse("").join("")
                }
            }
        })
    </script>
</body>

</html>